The speed of propagation of light in emptiness (in space) V = 300,000 km / sec. What is the equatorial circumference
| November 30, 2020 | education
The speed of propagation of light in emptiness (in space) V = 300,000 km / sec. What is the equatorial circumference of the Earth if light travels around the Earth 15 times in 2 seconds?
V light – 300,000 km / s
Circumference – ?
Light for 2 seconds flies by equivalent. land 15 times.
Decision:
1) in 2 seconds the light travels 600,000 km.
2) 600,000: 15 = 40,000 (km) – the circumference of the earth along the equator
Answer: the circumference of the earth at the equator = 40000 km
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